Sevenths to john d



(No Model.)

E. WAGEMANN.

CGNVERTER.

No. 426,153. PatentedApr. 22, 1890.

INVENTOR WI T NESSES ww@ BY M n /ym ATTORNEY UNITED STATES PATENT OEEICE.

EDMUND IVAGEMANN, OE LITTLE ROCK, ARKANSAS, ASSIGNOR OE SIX- SEVENTIIS TO JOHN D. ADAMS, DEAN ADAIIS, OSCAR DAVIS, .IOIIN W. DAVIS, HORACE G. ALLIS, AND .IOIIN IS. JONES, ALL OF SAME PLACE.

CONVERTER.

SPECIFICATION forming part of Letters Patent No. 426,153, dated April 22, 1890.

Application tiled August 22, 1889. Serial No. 321,593. (No model.)

To all whom t may concern:

Be it known that I, EDMUND WAGEMANN, a subject of the Emperor of Germany, and a resident of Little Rock, county of Pulaski,

and State of Arkansas, have invented certain new and useful Improvements in a Converter, of which the following is a specification.

My invention relates to a device for converting or transforming an electric current to of one potential into another and independent current of a different potential.

The object of the invention is to provide a simplified construction of mechanical details, and to acquire an increased efficiency of per" centagc of the second current in respect to the first. L

The details are all illustrated in the sheets of drawings and the drawings are explained as follows:

Figure l is a longitudinal cross-sectional vieW of the device, showing also the electrical connections. Fig. 2 is an end elevation ofthe complete device. Figs. 3 and i are respectively the front and edge view of one of the plates forming the primary of the converter. Fig. 5 is a view showing the disks forming the primary conductor in section, the same being accompanied by words showing that they are alternately of iron or copper.

The device consists of the combination of a tubular flanged spool a, upon which is wound the one coil (the secondary coil of the converter, preferably) lettered l); thin plates c and fn of copper and iron, respectively, laid and placed upon each other alternately, and located inside of the tubular spool so as to substantially occupy the larger part of the tubular space, the said plates being provided with holes c as a means of ventilation; springs d pressing upon each. end of the batch of plates c and n and resisted by bars c, which are fastened to the spool upon either end, and suitable electrical connections between the converter and generator f and translating devices g.

Aste the operation of my invention, I may say in the first place that it has been tried in practice, and I iind that by passing an al:

ternating current to the two terminals h, which are electrically connected to the cop- 5o per and iron plates, (which are in electric contact with one another,) a secondary current is successfully induced and produced in the secondary circuit, and that the translating devices become operative. As to the exact electrical operation of the platesto produce this phenomenon, I am not positively sure; but I think that it is due to a hind of condenser action between the two kinds of conducting metalsmnamely, iron and copper. 6o Before the means kof ventilation were pro vided the action was so marked that the heat developed was considerable.

It is thought that the maximum eiliciency may be obtained with the two metals, iron and copper.

The plates c and n. are separated from thc inner surface of the spool by means of strips of insulation fi. The relative locations of the plates and secondary coil in respect to each 7o other are that the planes of the plates are per pendieular to the axis of the coil.

The material el' the springs d and of the plates or bars e is metal, for the purpose of having the function ol' electric conductivity. 7 5

I cla-im as my inventionl. Au electric converter consisting of thev combination of a secondary coil, and a primary conductor consisting of super-posed plates of copper and iron arranged alter- Se nately with one another and surrounded by the said secondary coil, the axis of the said coil being perpendicular to the planes of the said plates.

2. In an electric converter, the combination 8 5 of atubularflangcd spool,upon which is wound the one coil of the converter, thin plates of iron and copper placed upon each other alternatoly and locatedinside of the said spool, the said plates being provided wit-h holes, 9o springs pressing upon each end of the batch of plates named, and bars pressing" upon the opposite ends of the said springs and fastcned to vthe said spool. at opposite ends thereof.

In an electriceonverteigthe combination 0f plates of iron and copper arranged altelmy invention I have signed my na1ne,i11 presnately upon each other and iu electric conence of two Witnesses, this 21st day of Autaci, a spool in which the said plates are ccn- -gust, 1889.

tained an (l from which they arc Separated by EDMUND VAGEMANN. 5 suitable insulation, and a coil of electric con- NVitnesses:

(luctor wound upon said spool. E. G. DUVALL, .l 1'.,

ln testimony that I claim the foregoing; as EDWARD P. THOMPSON. 

